<template>
    <!-- 本页为首页 -->
    <div class="about">
        <h1>This is an  page</h1>
    </div>
</template>

<script setup>
import { ref, onMounted, onUnmounted } from 'vue';

const message = ref('Hello, Vue 3!');
onMounted(() => {
    // Your code here
});

// 在组件卸载前执行的操作
onUnmounted(() => {
    // Your code here
});
</script>